First of all, plants do need nutes if you want them to grow strong and produce flowers and such, you can probably keep them alive for a good long while on just water, but they won't do much else. Secondly, transplanting into new soil is just going to spread the fungal contamination to the new pot if you don't address it, and it may not really be a detriment anyway (depending on what kind of contamination you've got). Thirdly, you probably don't need to water every other day; is the top layer of the soil getting dried out? Fourthly, why do you think that a worm will help it survive when you don't know what's wrong with it. And, Finally, it looks like you're using a halogen desk lamp which produces lighting in a spectrum that is generally not conducive to plant growth, and is probably not putting enough light to really get things going anyway; try reading some of the stickies in the lighting section.